inclemency vs hardness

inclemency and hardness both are nouns.

Word	Noun	Adjective	Verb	Adverb
inclemency	Yes	No	No	No
hardness	Yes	No	No	No

As nouns, inclemency and hardness are synonyms defined as:

Other synonyms of inclemency include harshness, rigor, rigorousness, rigour, rigourousness, severeness, severity, stiffness.

inclemency (noun)	hardness (noun)
excessive sternness	a quality of water that contains dissolved mineral salts that prevent soap from lathering
weather unsuitable for outdoor activities	the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale
	the quality of being difficult to do
	devoid of passion or feeling; hardheartedness
	excessive sternness